Analytical modelling of unbalanced magnetic pull in isotropic electrical machines

Author

Gerlando, Antonino Di ; Foglia, Giovanni Maria ; Perini, Roberto

Author_Institution

Dept. of Electr. Eng., Politec. di Milano, Milano

fYear

2008

fDate

6-9 Sept. 2008

Firstpage

1

Lastpage

6

Abstract

The phenomenon of the unbalanced magnetic pull is analytically modelled, referring to cylindrical rotor A.C. machines. Even if under some simplifications (sinusoidal space distribution of the current density, no slotting, no saturation, no parallel paths), various compact and significant expressions of field and force are obtained, for any number of pole pairs: the model is based on a critical re-formulation of the air-gap m.m.f., by discussing the homopolar term. Some FEM simulations confirm the soundness of the proposed approach.

Keywords

AC machines; air gaps; finite element analysis; rotors; FEM simulation; air-gap m.m.f reformulation; cylindrical rotor AC machine; finite element method; isotropic electrical machine; unbalanced magnetic pull modelling; Air gaps; Analytical models; Current density; Machine windings; Magnetic analysis; Magnetic flux; Magnetic levitation; Rotors; Saturation magnetization; Stator windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines, 2008. ICEM 2008. 18th International Conference on

Conference_Location

Vilamoura

Print_ISBN

978-1-4244-1735-3

Electronic_ISBN

978-1-4244-1736-0

Type

conf

DOI

10.1109/ICELMACH.2008.4799998

Filename

4799998